<div style="background: #66B3FF">
	<li>
		<th>
		<input type="checkbox" name="checkbox" id="select" onclick="return select_all();" value="全选"/>全选|
		<a href="javascript:void(0)" id="add_head">添加</a>|
		<a href="javascript:void(0)" id="edit_head">修改</a>|
		<a href="javascript:void(0)" id="del_head">删除</a>
	</li>
</div>